Table 2:
Remedies to communication problems
Problem
Action
Is the network cable connected?
•
Check the cables.
•
Check that the cables are connected to correct communication ports.
Is the IED responding to any
communication?
•
Open the command prompt.
•
Type
ping <devices_IP_address>/–t
and wait for at least one minute to see if
there are any communication breaks.
•
If the ping does not work, check the communication settings: IP gateway, IP addresses,
subnet masks and firewalls.
Is the IP address unique in the subnetwork? •
Unplug the communication cable from the IED and ping the IP address.
•
If there is a response to the ping, find the device with the same IP address from the
network and remove it.
Is the SCL technical key correct?
If the technical key is not correct, a message is displayed in the PCM600 Output window.
•
Select the IED from the PCM600 tree structure and run Set Technical Key.
Are the communicating devices in the same
subnetwork?
•
Verify the PC and IED communication addresses and subnet masks.
Is the communication port set correctly?
•
Select the IED from the PCM600 tree structure and check the Communication Port
setting from the shortcut menu.
•
Verify that the IP address in the Object Properties window is correct.
Was PCM600 first connected to one relay
with a certain IP address, and the cable then
switched to another relay with the same IP
address, and the communication is not
working any more?
Windows creates an ARP table containing MAC address and IP address pairs. Clearing this
table helps to get communication working when the pairs no longer match. Every relay
communication card has a unique MAC address. However, for example in 615 series, the
front port IP address is fixed. This can create a mismatched ARP table when several relays
are used. Windows also refreshes the ARP table automatically, but this can take several
minutes.
•
Click the Start button, write
cmd
in the search box and press ENTER to open the
command prompt.
•
Type
arp -d
and press ENTER to clear the ARP table. If this command is not
recognized or allowed, open the command prompt as an administrator.
Are there several PCM600 processes
running simultaneously on the same PC?
Only one PCM600 process can communicate at a time.
•
Stop other PCM600 instances while communicating with the IED.
Is the parameter communication working?
•
Open the parameter settings and try to read parameters.
If the parameter setting works and if there is no other communication, the problem can
be in the firewall settings.
Is the IED communication reserved by other
clients?
•
Determine the maximum amount of simultaneous clients.
In the IEC 61850 communication, this can be seen in the device's SCL file.
In some IEDs, the used clients from the IED can be checked manually from the WHMI.
•
Isolate the IED from other communication devices to make sure that the clients are not
reserving the communication.
•
Try to communicate with the IED directly from the front port when the rear port cable is
disconnected.
Does the communication work with other
software than PCM600?
•
If the IED supports the IEC 61850 communication, try to communicate with the IED with
a third-party client.
If the communication fails, check the network configuration.
Table continues on next page
1MRS757866 C
Section 4
Use cases for operation and field
PCM600
23
Getting Started Guide
